Corrugated-board container and blank therefor



June 7 1927 c. H. cRowl-:LL

CORRUGATED BOARD CONTAINER AND BLANK THEREFOR Filed Dec. 11. 1923 'una ing Patented `lune 7, 1927.

UNITED STATES CHARLES .'H. CROWELL, OF WHITE PLAINS, NEW YORK.

COBRUGATED-BOARD CONTAINER AND BLANK THEREFOR. i

Application led December 11, 1923. Serial No. 679,880.

This application is a partial continuation of my copending cases Serial No. 494,073, filed August 22, .1921, and Serial N o. 569,354, filed June 19, 1922, and contains subject matter taken therefrom.

This invention relates especially to shipping containers made of corrugated paper board in which the body of the container may advantageously' comprise a three or four sided blank having transverse creases between the sides and preferably having its edges rabbeted or stepped so as to form a projecting edge flange which comprises the outer facing or liner sheet of the paper board. This stepped edge may be greatly reenforced by pasting -thereon a seam or edge reenforcing tape of gummed clot-h or paper which engages the inner facing of the corrugated board and also adhesively engages the cut or rabbeted edge and the projecting ed e flange and is folded around the edge of t 1e flange and the tape edge secured to the outer facing, so as to greatly strengthen this projecting flange against splitting in case the cooperating member of the container is forced outagainst it. The body blank may have secured thereto one o r more free'sealflaps or tapes preferably having corner folding notches so that after the cooperating lanks or members of the container are assembled and glued or secured in place, if desired, these sealing flaps may be pasted over the same to securely and strongly hold them in place and tightly close the container, In some cases, however, it is desirable where the blanks are to be shipped long distances before being assembled and used, to originally secure the sealing flaps or tape strips tort-he edges of the upper and lower 'covers so as to leave free sealing flaps which may be folded back against or adjacent the cover for shipping purposes. In some cases it is also desirable to adhesively secure single or double gummed reenforcing tapearound the edges of the cover blanks before applying the sealing strips thereto so as to strengthen these edges and practically seal the air spaces comprised in the covers.

In the accompanying drawing whlch shows in a somewhat diagrammatic way several illustrative embodiments of theinvention- Fig. 1 is a perspective view of an illus trative container, l

Fig. 2 is a plan view of a blank Fig. 3 is an enlarged sectional detail showing the form of edge joint and sealing members,

Fig. 4 is a similar sectional View where transversely or cross-corrugated paper board is used for the container elements, and

Fig. 5 is a perspective View showing a contherefor,

tainer in which the sealing tape is attached to the cover. l

The body blanks for these containers may be made of ordinary or cross corrugated paper board and of such size and proportion as to suit the particular container desired. As is shown in Figs. 1 and 2, the container may comprise a four-sided straight strip body blank hav-ing the transverse folding creascs formed therein between the ad'acent sides 1, 2, 3, 4 and it is usually desira le to have the corrugations run vertically o r transversely of the length of this body blank in cases where single corrugated paper board is used for making the same. Asis shown more in detail in Fig. 3, the edge portions of the blank which may be formed with special or heavy facing sheets may advantageously be given a rabbeted or stepped form so as to leave a projecting edge flange 18 comprising the outer facing 16 of the corrugated board to which the usual corrugated spacing member 17 is adhesivel secured. These stepped edges of the `body blank may be produced in any desired way and may be formed or finished by grinding with coarse emery wheels or the like so as to give smooth and accurate edges` These projecting edge flanges or stepped edges 11, l2 .of the body` blank may .be greatly strengthened .cured at 15 to the inner facing and may then extend at 14 across the spacing member 17.

and reenforced by 'adhesively v 'securing thereto flange reenforcing tape suc This edge flange reenforcing tape may then be secured at 13 to the inner face of the flange 18 and may extend at 19 around its edge and then be adhesively secured at 20 to its outer face and to the adjacent portions of the outer facing as at 21. `In this Way this edge flange is enclosed and supported and strongly connected to the inner facing sheet of the corrugated board so as to be greatly strengthened against outward pressure* exerted by the cover members of the container, for instance, so that splitting off of this projecting flan e is thus minimized. Both the upper and ower edges -of thevbody blank may be similarly provided with such tape reenforcedf. stepped edges or projecting flanges and it is, of course, advantageous to have this reenforcing tape applied at the factory Where the blanks are shaped and creased Wherethis tape may be attached by experienced operators under standard conditions. i

Itis, of course, understood that Where a straight strip body blank is used as shown in Fig.. 2 a connector tape of gummed cloth or paper such as 9 may be secured to the bodyv blank at the factory and adheslvely secured .to the other end of this body blank as shown in Fig. 1 when the container is made up and used. In some cases it is advantageous to form `this connector tape slightly longer than the Width of the body blank so that its ends ma be folded over the. edges of the body blan and adhesively secured to the inner faces of these `parts so as to engage and hold together' the projecting edge flanges for instance in some cases.

It is advantageous to use separate top and bottom covers with such body blanks and.

covers may be made of single or double corrugated paper board of the proper size so as to preferably lit Within the vprojecting edge flanges of the body blank as shown in Fig. 3 so that they can be securely'held in this position by vsuitable sealing tape, for instance, which may be originally secured to the body or cover blanks or applied to the joint when the blanks are assembled to form the container.' A strong and efficient construction can be secured when the sealing tape is originally applied tothe body blank as is shown in Figs. 2 and 3, this sealing tape of heavy gummed paper or cloth bein securely attached to the edges of the v ody blank as'at 25 so as to leave projectin edges or free'sea-ling flaps 5 which are pre erably more ,or less separated by corner folding notches such as 10 in the tape. Whenthe container is-assembled these sealing flaps may be moistened land folded down on the cover 7, for instance, as shown in Fig. 1 so as to form a strong and substantially tight seal for the container. In somel cases it is advantageous to usev single or double gummed paper or cloth tape as 'a cover edge reenycured to the covers such as forcement extending around some or all the edges of the covers, as is shown in Fig. 3, Where the tape 23 extends around and practically seals the edge of the cover 7 and greatly strengthens the same in connection With the edges 22, 24 of this reenforcing'tape which engage the adjacent faces of the cover. Where double gummed tape' isused for this edge reenforcement of the cover it may be moistened so as to have effective securing and sealing action in connection with the adjacentv stepped edges and vprojecting flange of the body blank and the sealing tape which may beused to unite these parts. As is shown in Fig. 4 cross corrugated paper board may be used for both the body and cover' blanks, if desired, and may comprise the corrugated spacing members 27, 29 adhesive- -ly secured in any suitable way to the facing sheets 26, 28 and 30. Stepped edges may be formed on such a body blank, preferably by removing the sheets as indicated in Fig. 4 so as to leave a projecting flange consisting of or comprising f in connection with other of the sheets the outer facing sheet 26 Which may be of heavy or special strong paper and this edge flange 18 may be similarly strengthened by being enclosed in the flange reenforcing gummed tape applied and secured to these parts as described in connection With Fig. 3. The cover 7 may then be put in place so as to engage this stepped edge of the body portion 31 to Which itv may be adhesively se- `cured by any suitable means as by additional adhesive applied between these surfaces, if desired, so as to cooperater with the .sealing tape applied to the joint as, for instance, by first being adhesively secured to the edges' of the body blank so that the free sealing flaps 5 may bev forced down over the edges 32 of the cover. For convenience of shipping these blanks 1t is often desirable as shown in Fig. 5 to have the sealing strips or fla s originally se- 7) to which they may be pasted or secured in the form of separate strlps of gummed tape, for example, so as to leave free edges 25 of these sealing fla-ps which for shipping purposes may be.

folded or bent back adjacent the cover so as not to be torn or undesirably bent during shlpment. Then When the cover is putin place on the assembled body blank these sealing flaps may be moistened and then folded down over the edges of the body blank as shown at the left of Fig. 5 so as to make a strong and. secure union therewith and effectively seal the joint, especially where the cover has been provided with single or preferably double gummed reenforcin tape 22, 23,' 24, the exposed faces of Whic may be moistened where they engage the body blank so as to strongly adhere thereto.

This invent1on has been described in conblank and rest upon the nection with a number of illustrative em-l bodiments, forms, portions, parts, materials, arrangements and methods of manufacture and use, to the details vof which disclosure the invention is not of course t be limited, since What is claimed as new and what is desired to be secured b Letters Patent is set forth in the append claims.

l. The corrugated paper board shipping container comprising a four sided straight strip body blank of corrugated paper board formed with heavy facing sheets and hav-- ing the corrugations arranged transversely of the len h of the blank and having transverse fol ing creases between the adjacent sides, said blank being formed with stepped I edges in which the outer facing of the corrugated board constitutes a projecting edge flange, seam reenforcing tape secured to said stepped edges and adhesively secured to the inner facing of the corru ated board and A "2. The corrugated paper boardA shipping container comprising a four sided straight strip body blank of corrugated paper boardv formed with stepped edges in which the outer facing of the corrugated board con-l stitutes a projecting edge flan e, seam reenforcing tape extendin arouii and enclosing said edge flange an adhesively secured thereto and to the adjacent inner facin -sheet to strengthen the edge' flange, an

corruseparate top and bottom covers o gated paper board ada 'ted to be adhesively secured to the adjacent ody portions of said body blank. j

3. The corrugated paper board shipping container comprising a body blank of` corrugated pa-per board formed with stepped edges having seam reenforcing tape extending around and strengthening the stepped edges, and separate j covers of corrugated paper board havin their edges enclosed byA adhesively secure reenforcing tape and having free sealing iiaps' adhesively secured adjacent the edge of the cover member and adapted-to be folded back against its outer' face and t'o b'e adhesively secured jacent ortion .of said body blank. l

4. T ie multiple side container body blank of corrugated paper board formed with foldy ingucreas'es an with stepped-edges and seam reenforcing tape secured to the oppositel sides of the facing members of thev corru-v ated board adjacent said step ed ed es and ocked around the edge -of t e projecting .edge flange to strengthen the same againstv outward pressure," andy cooperating covers of corrugated paper board aving edges en'- gaged by adhesively secured reenforcing tape and having sealing flaps adhesively secured adjacent the corresponding edge of the cove'rand having their freeedges folded back adjacent its outer face for shipping and adapted to be adhesivel secured tothe adjacent portions of said b O y blank.

5. 'A shipping container having a stepped edge with a projecting edge langeand a seam reinforcing tape secured to the inner face of the container `and'extending over 854 the 4step and projecting flange into secured engagement with the outer face of` the com tainer. C

:Las H. CROWELL." l l 

